Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I just added an appt to my calendar online and it synched to my phone just fine. Or am I reading your problem wrong?
This happened long ago on my OG Droid. You can try this solution that worked 'back in the day':EDIT: To add to the goofiness, I just added an event directly to my Google Calendar. It showed up on the phone calendar. Only events added through Outlook aren't being pushed to my phone. Is there a setting I'm missing somewhere in Outlook or Google Calendar?
I was told the loss of my calendar was a result of the factory re-set. Real bummer - since I rely upon/& need access to older calendar events regularly on my phone!
This happened long ago on my OG Droid. You can try this solution that worked 'back in the day':
goto settings > apps > manages apps > all > calendar storage > clear data
NOTE if you delete the data, it will erase the phones calendar data and have to resync all the calendar events, and note that you will lose any OLD data (like more than a month, as it will only sync more recent calendar items)

The AUTO-SYNC item was NOT checked. So I checked it, chose to "MANAGE my gmail account" and noticed that the calendar was not checked even though the other contacts were. SO... Start with Settings, then Accounts and Sync, and maybe you will have some luck too! My calendar online was fine, just not syncing with the phone. I'm now a very happy android user. . . 
